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Domainlike Organizations in Ferroelectrics Containing Quenched Randomness

Published online by Cambridge University Press:  15 February 2011

Dwight Viehland ,
M. Y. Kim ,
Z. Xu  and
Jie-Fang Li
Dwight Viehland
Affiliation:
Department of Materials Science and Engineering, and the Materials Research Laboratory, University of Illinois, Urbana, IL 61801
M. Y. Kim
Affiliation:
Department of Materials Science and Engineering, and the Materials Research Laboratory, University of Illinois, Urbana, IL 61801
Z. Xu
Affiliation:
Department of Materials Science and Engineering, and the Materials Research Laboratory, University of Illinois, Urbana, IL 61801
Jie-Fang Li
Affiliation:
Department of Materials Science and Engineering, and the Materials Research Laboratory, University of Illinois, Urbana, IL 61801
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Abstract

Transmission electron microscopy studies of the (1-x)Pb(Mg1/3Nb2/3)O3-(x)PbTiO3 (PMN-PT (1-x)/x) crystalline solution have been performed for x=0.1, 0.2, 0.35, and 0.60. Bright-field imaging has revealed a common sequence of domain-like states with increasing x. Normal micron-sized ferroelectric domains were found for x>0.40. Tweed-like structures were found for x∼0.35. These tweedlike structures are similar to those previously reported in pre-martensitic states. Paraelectric clusters were found for x<0.30. The paraelectric cluster state was characterized by the lack of self-assembly amongst embryos and the presence of relaxor behavior in the macroscopic response characteristics. The composition PMN-PT 65/35 was then modified with La for a detailed study of the transition between the tweed-like precursor and paraelectric cluster states with increasing impurity content.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 453: Symposium R – Solid State Chemistry of Inorganic Materials , 1996 , 419
Copyright
Copyright © Materials Research Society 1997

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